Ch. 17 - Blood & Blood Vessels (17.8 Only Pg 590-591)

15 Questions  I  By Seres21e
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Blood Quizzes & Trivia
Bob Beregowitz

  
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  • 1. 
    Platelets function in all of the following, except
    • A. 

      Dissolving a formed clot.

    • B. 

      Forming temporary clump in injured areas.

    • C. 

      Contraction after clot formation.

    • D. 

      Initiating the clotting process.

    • E. 

      Releasing chemicals that stimulate clotting.


  • 2. 
    ________ involves a cascade of reactions leading to the conversion of fibrinogen to fibrin.
    • A. 

      Vascular spasm

    • B. 

      The platelet phase

    • C. 

      Retraction

    • D. 

      Coagulation

    • E. 

      Fibrinolysis


  • 3. 
    The conversion of fibrinogen to fibrin is catalyzed by the enzyme
    • A. 

      Fibrinogen-converting enzyme.

    • B. 

      Plasmin.

    • C. 

      Factor VIII.

    • D. 

      Thrombin.

    • E. 

      Prothrombinase.


  • 4. 
    The extrinsic pathway of coagulation is initiated by the
    • A. 

      Sticking of platelets to damaged tissue.

    • B. 

      Activation of Factor VII exposed to collagen.

    • C. 

      Release of tissue factor (Factor III) by damaged endothelium.

    • D. 

      Release of heparin from the liver.

    • E. 

      Conversion of prothrombin to thrombin.


  • 5. 
    The intrinsic pathway of coagulation is activated by the
    • A. 

      Sticking of platelets to damaged tissue.

    • B. 

      Activation of proenzymes exposed to collagen.

    • C. 

      Release of tissue factor (Factor III) by damaged endothelium.

    • D. 

      Release of heparin from the liver.

    • E. 

      Conversion of prothrombin to thrombin.


  • 6. 
    The common pathway of coagulation begins with the
    • A. 

      Sticking of platelets to damaged tissue.

    • B. 

      Activation of a proenzyme exposed to collagen.

    • C. 

      Release of tissue factor by damaged endothelium.

    • D. 

      Conversion of Factor X to prothrombinase.

    • E. 

      Conversion of fibrinogen to fibrin.


  • 7. 
    The process of fibrinolysis
    • A. 

      Activates fibrinogen.

    • B. 

      Draws torn edges of damaged tissue closer together.

    • C. 

      Dissolves clots.

    • D. 

      Forms emboli.

    • E. 

      Forms thrombi.


  • 8. 
    The enzyme that can digest fibrin and dissolve a clot is
    • A. 

      Thrombin.

    • B. 

      Plasmin.

    • C. 

      Heparin.

    • D. 

      Fibrinase.

    • E. 

      Phosphokinase.


  • 9. 
    Tissue factor (Factor III) is a factor in the ________ pathway.
    • A. 

      Extrinsic

    • B. 

      Intrinsic

    • C. 

      Common

    • D. 

      Retraction

    • E. 

      Fibrinolytic


  • 10. 
    Platelet factor (PF-3) is a factor in the ________ pathway.
    • A. 

      Extrinsic

    • B. 

      Intrinsic

    • C. 

      Common

    • D. 

      Retraction

    • E. 

      Fibrinolytic


  • 11. 
    Which of these descriptions best matches the term platelets?
    • A. 

      Adhere to collagen beneath endothelium

    • B. 

      Helper cells are one type

    • C. 

      Produce antibodies in response to antigens

    • D. 

      Kill bacteria using hydrogen peroxide

    • E. 

      Often elevated in allergic individuals


  • 12. 
    Some rat poisons contain a toxin that blocks the liver's ability to utilize vitamin K. Animals that consume this poison would die of
    • A. 

      Anemia.

    • B. 

      Acidosis.

    • C. 

      Hemorrhage.

    • D. 

      Thrombocytopenia.

    • E. 

      Starvation.


  • 13. 
    A substance that activates plasminogen might be useful to
    • A. 

      Cause clots to form faster.

    • B. 

      Cause clot dissolution to proceed faster.

    • C. 

      Initiate clot formation.

    • D. 

      Mimic erythropoietin.

    • E. 

      Recruit neutrophils to an infection.


  • 14. 
    How would removal of calcium ions from a blood sample affect coagulation?
    • A. 

      The coagulation pathway would be lacking a required cofactor at many steps.

    • B. 

      Coagulation would be prevented.

    • C. 

      There would be no important effect because magnesium can substitute for calcium

    • D. 

      The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented.

    • E. 

      The coagulation pathway would be lacking a required cofactor at many steps and no important effect because magnesium can substitute for calcium.


  • 15. 
    Platelets are stored as a reserve in case of hemorrhage in
    • A. 

      The splenic vein.

    • B. 

      The splenic artery.

    • C. 

      The spleen.

    • D. 

      Other vascular organs.

    • E. 

      The spleen and other vascular organs.


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